10 THE LICHENS OF PERTHSHIRE 
which nine enclosures are numerous, these lichens multiply 
exceedingly on the many suitable habitats provided by old gate- 
posts, el barn-doors, and other worked wood. Such lignicole 
species are - following :—Calicium Bcmamahatilin C. curtum, 
C. elassos Usnea hirta, Platysma diffusum, P. glaucum, 
Hvernia parca rote fuliginosa, P. physodes, Callopisma 
vitellina, Lecanora symmictera, L. sarcopis, L. Hagent, L. meta- 
boliordes, L. hintcate. “Phin = exiqua, Cladonia delicata, 
C. macilenta, Lecidea albohya L. parasema, L. aniptiza, 
L. fucata, Biatorella Spa Daten synothea, and Buellia 
disciformis. 
he ground vegetation of the woodlands often carries so 
dense a crop of herbaceous Larsiea that lichens are crowded out 
decaying shad 
Mossy knolls and rocks, stumps, and y banks yield 
Peltigera canina, P. p “bie yla, P. rufescens, P. horizontalis, 
P ae asap 4 pyxidata, C. fimbriata, C. La is al, 
“The ru estral lichens =e this lower ee have not yet been 
adequate ly studied. They c t be classed satisfactorily in the 
groups into which the higher ‘plants have — divided. <A given 
district may contain who communities which owe their 
presence to edaphic Hears mac different se those to which 
the culate flora owes its origin. Scattered erratic gouerls 
d even small stones, will often yield gi unexpected spec 
producing a very mixed lichen-flora. For example, in the distrie ~ 
grey hornblende-granite, originating on Ben Alder and Rannoch 
Moor, are widely scattered, and are sometimes perched on cal- 
s 
into — devoid . calcareous rock. The following species have 
been noticed on mortar, plaster, or concrete of walls, buildings 
and ‘alliona SI 7 furvum, C. _ cidum, C. pulposum, . 
crispum, C. granuliferum, C. cristatum, Collemodium Schrader 
Leptogium scotinum, Xanthoria parietina, Physcia erat 
Placodium murorum, P. sympageum, Callopisma citrina, Lecanora 
circinata, Acarospora pruinosa, Urceolaria scruposa, Bilimbia 
— ica, B. sabuletorum, Buellia canescens, and Verrucaria 
muralis 
